Last modified by Mengting Qiu on 2024/04/30 14:27
<
From version < 35.1 >
edited by Edwin Chen
on 2022/05/22 23:53
To version < 15.1 >
edited by Edwin Chen
on 2022/05/15 08:07
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57 57  * ±2°C accuracy from -55°C to +125°C
58 58  * Operating Range: -55 °C ~~ 125 °C
59 59  
60 -= Connect LHT65N to IoT Server =
61 -
62 -== How does LHT65N work? ==
63 -
64 -LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
65 -
66 -If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
67 -
68 -
69 -== How to Activate LHT65N? ==
70 -
71 -The LHT65N has two working modes:
72 -
73 -* **Deep Sleep Mode**: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
74 -* **Working Mode**: In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65 will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
75 -
76 -The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
77 -
78 -[[image:image-20220515123819-1.png||height="379" width="317"]]
79 -
80 -|**Behavior on ACT**|**Function**|**Action**
81 -|**Pressing ACT between 1s < time < 3s**|Test uplink status|If LHT65N is already Joined to the LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has an external sensor connected, blue led will blink once. If LHT65N has no external sensor, red led will blink once.
82 -|**Pressing ACT for more than 3s**|Active Device|green led will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network. green led will solid turn on for 5 seconds after join in network.
83 -|**Fast press ACT 5 times**|Deactivate Device|red led will solid on for 5 seconds. This means LHT65N is in Deep Sleep Mode.
84 -
85 -== Example to join LoRaWAN network ==
86 -
87 -(% class="wikigeneratedid" %)
88 -This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
89 -
90 -(% class="wikigeneratedid" %)
91 -[[image:image-20220522232442-1.png||height="387" width="648"]]
92 -
93 -Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
94 -
95 -
96 -=== **Step 1**: Create Device n TTN ===
97 -
98 -Create a device in TTN V3 with the OTAA keys from LHT65N.
99 -
100 -Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
101 -
102 -[[image:image-20220522232812-2.png||height="219" width="279"]]
103 -
104 -User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
105 -
106 -Add APP EUI in the application.
107 -
108 -[[image:image-20220522232916-3.png]]
109 -
110 -
111 -[[image:image-20220522232932-4.png]]
112 -
113 -
114 -[[image:image-20220522232954-5.png]]
115 -
116 -Note: LHT65N use same payload as LHT65.
117 -
118 -[[image:image-20220522233026-6.png]]
119 -
120 -
121 -Input APP EUI,  APP KEY and DEV EUI:
122 -
123 -[[image:image-20220522233118-7.png]]
124 -
125 -
126 -=== Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
127 -
128 -Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
129 -
130 -[[image:image-20220522233300-8.png]]
131 -
132 -
133 -== Uplink Payload: ==
134 -
135 -The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
136 -
137 -After each uplink, the (% class="mark" %)BLUE LED(%%) will blink once.
138 -
139 -
140 -(% style="width:572px" %)
141 -|(% style="width:106px" %)**Size(bytes)**|(% style="width:71px" %)**2**|(% style="width:128px" %)**2**|(% style="width:103px" %)**2**|(% style="width:72px" %)**1**|(% style="width:89px" %)**4**
142 -|(% style="width:106px" %)**Value**|(% style="width:71px" %)[[BAT>>path:#Battery]]|(% style="width:128px" %)(((
143 -[[Built-In>>path:#SHT20_Temperature]]
144 -
145 -[[Temperature>>path:#SHT20_Temperature]]
146 -)))|(% style="width:103px" %)(((
147 -[[Built-in>>path:#SHT20_Humidity]]
148 -
149 -[[Humidity>>path:#SHT20_Humidity]]
150 -)))|(% style="width:72px" %)[[Ext>>path:#Extension_Sensor]] #|(% style="width:89px" %)[[Ext value>>path:#Extension_sensor_value]]
151 -
152 -* The First 6 bytes: has fix meanings for every LHT65N.
153 -* The 7th byte (EXT #): defines the external sensor model.
154 -* The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won’t be these four bytes.)
155 -
156 -
157 -=== Decoder in TTN V3 ===
158 -
159 -When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
160 -
161 -Below is the position to put the decoder and LHT65N decoder can be download from here:
162 -
163 -
164 -[[image:image-20220522234118-10.png]]
165 -
166 -
167 -== LED Indicator ==
168 -
169 -The LHT65N has a triple color LED which for easy shows different stage.
170 -
171 -While pressing ACT button, the LED will work as per LED status with ACT button.
172 -
173 -In a normal working state:
174 -
175 -* For each uplink, the BLUE LED or RED LED will blink once.
176 -* BLUE LED when an external sensor is connected
177 -* RED LED when an external sensor is not connected
178 -* For each success downlink, the PURPLE LED will blink once
179 -
180 -----
181 -
182 -== Installation ==
183 -
184 -[[image:image-20220516231650-1.png||height="632" width="620"]]
185 -
186 -
187 -
188 -
189 189  = Sensors & Accessories =
190 190  
191 191  == E3 Temperature Probe ==
192 192  
64 +== ==
65 +
193 193  [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
194 194  
195 195  
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270 270  (1) This device may not cause harmful interference, and
271 271  
272 272  (2) this device must accept any interference received, including interference that may cause undesired operation
146 +
147 +
148 +
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